Highlights of Enhancements

The following are highlights of other enhancements in SAS/STAT 12.1:

  • The MCMC procedure now models missing values by default. The RANDOM statement supports multilevel hierarchy to an arbitrary depth. The procedure also implements faster and more efficient sampling algorithms.

  • The PHREG procedure supports Bayesian frailty models.

  • The FMM procedure for finite mixture models is now production and adds several truncated distributions.

  • The LIFEREG and PROBIT procedures include additional postprocessing statements. They now support the TEST, LSMEANS, LSMESTIMATE, ESTIMATE, SLICE, and EFFECTPLOT statements.

  • The FREQ procedure produces mosaic plots.

  • The SURVEYSELECT procedure provides Poisson sampling.

  • The SURVEYMEANS procedure now performs poststratification estimation.

  • The GLM, MIXED, GLIMMIX, and ORTHOREG procedures support the REF= option in the CLASS statement.

More information about the changes and enhancements follows. Details can be found in the documentation for the individual procedures in the SAS/STAT 12.1 User’s Guide.